An utility to create the input for trentoP.

<p>
The aim of this class is to create the input FeatureCollection for the TrentoP models.
</p>
<p>
It can generate several Feature: the input for TrentoP for the project mode (empty feature) or calibration mode
(empty or create from another output simulation featureCollection), and a Polygon FeatureCollection which can contains the areas to associate to the input file.
</p>